Cassandra首次使用和强制性问题。 Cassandra在复制因子= 2的2节点集群中运行,并且当1个节点关闭时行更新失败。
Keyspace定义如下。
CREATE KEYSPACE call_completion_dataspace WITH replication = {'class':'NetworkTopologyStrategy', 'DC1': '2'};
手动停止节点1上的服务时。行更新停止工作。见下文
cqlsh>select * from requests where b_msisdn=1;
b_msisdn | request
1 | {"321":{"a_party":"321","b_party":"1234","request_timestamp":"Aug 12, 2015 4:25:30 PM","request_type":"autocall","call_failed_scenario":"noasnswer","refId":"113365567757_68961c4"}}
在节点1关闭时更新行
cqlsh>UPDATE call_completion_dataspace.callcompletionrequests SET request='"111"' WHERE b_msisdn=1;
cqlsh>select * from call_completion_dataspace.callcompletionrequests where b_msisdn=1;
列应该更新,但是
b_msisdn | request
1 | {"321":{"a_party":"321","b_party":"1234","request_timestamp":"Aug 12, 2015 4:25:30 PM","request_type":"autocall","call_failed_scenario":"noasnswer","refId":"113365567757_68961c4"}}
如果在' up'上运行nodetool修复。节点。更新开始像往常一样工作。似乎节点未能注册另一个节点已关闭。
答案 0 :(得分:1)
好的问题是,服务器的时间不同步。匹配后查询运行正常。